public void Handle(PayedForBillEvent msg)
 {
     _modelBuilder.Add(new TransactionHistory
     {
         BalanceId         = msg.BalanceId,
         EventType         = typeof(PayedForBillEvent).Name,
         Event             = msg.ToPropsString(),
         Id                = Guid.NewGuid(),
         TransactionAmount = msg.Amount,
         Time              = DateTimeFacade.Now
     });
 }